I feel like I'm on the 'worlds first flight' with this remote vehicle project. I've so far only managed to get the throttle servo interfaced to a 12C672 - soon to have some brains installed. It's going to be rather tricky making this chip maintain a constant speed when it starts out with 'L' plates each time. I've created an algorithm which seems to work reasonable well in the lab, but the real world will be the test. All the best Wagner. -- Best regards Tony http://www.picnpoke.com mailto:sales@picnpoke.com